US4000014A - Process for producing ductile superconductive alloys - Google Patents
Process for producing ductile superconductive alloys Download PDFInfo
- Publication number
- US4000014A US4000014A US05/507,072 US50707274A US4000014A US 4000014 A US4000014 A US 4000014A US 50707274 A US50707274 A US 50707274A US 4000014 A US4000014 A US 4000014A
- Authority
- US
- United States
- Prior art keywords
- melt
- superconductive
- base metal
- compounds
- percent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 45
- 239000000956 alloy Substances 0.000 title claims abstract description 45
- 230000008569 process Effects 0.000 title claims abstract description 45
- 150000001875 compounds Chemical class 0.000 claims abstract description 29
- 239000010953 base metal Substances 0.000 claims abstract description 22
- 239000000155 melt Substances 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 16
- 239000010949 copper Substances 0.000 claims abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000004927 fusion Effects 0.000 claims abstract description 6
- 229910052709 silver Inorganic materials 0.000 claims abstract description 6
- 239000004332 silver Substances 0.000 claims abstract description 6
- 239000010955 niobium Substances 0.000 claims description 10
- 238000007711 solidification Methods 0.000 claims description 9
- 230000008023 solidification Effects 0.000 claims description 9
- 239000010931 gold Substances 0.000 claims description 6
- 229910052732 germanium Inorganic materials 0.000 claims description 5
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052737 gold Inorganic materials 0.000 claims description 5
- 238000007712 rapid solidification Methods 0.000 claims description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 4
- 229910052718 tin Inorganic materials 0.000 claims description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052733 gallium Inorganic materials 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 238000002074 melt spinning Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 239000002826 coolant Substances 0.000 claims 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 230000007704 transition Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000008187 granular material Substances 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 238000005491 wire drawing Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000000137 annealing Methods 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/01—Manufacture or treatment
- H10N60/0184—Manufacture or treatment of devices comprising intermetallic compounds of type A-15, e.g. Nb3Sn
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/01—Manufacture or treatment
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/01—Manufacture or treatment
- H10N60/0156—Manufacture or treatment of devices comprising Nb or an alloy of Nb with one or more of the elements of group IVB, e.g. titanium, zirconium or hafnium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S420/00—Alloys or metallic compositions
- Y10S420/901—Superconductive
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S505/00—Superconductor technology: apparatus, material, process
- Y10S505/825—Apparatus per se, device per se, or process of making or operating same
- Y10S505/912—Metal founding
- Y10S505/913—Casting process
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S505/00—Superconductor technology: apparatus, material, process
- Y10S505/825—Apparatus per se, device per se, or process of making or operating same
- Y10S505/912—Metal founding
- Y10S505/913—Casting process
- Y10S505/915—Making composite product
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49014—Superconductor
Definitions
- This invention relates to a process for producing ductile, superconductive alloys by incorporating one or more superconductive compounds by fusion in a base metal having good electrical and heat conductive properties; for example, copper, silver, aluminum, or the like.
- a base metal having good electrical and heat conductive properties; for example, copper, silver, aluminum, or the like.
- the individual particles of the superconductive compound or compounds are finely distributed in the base metal and are mutually spaced apart in such a way that the critical value for the tunnel effect is not exceeded.
- a process for producing ductile, inherently stable, superconductive wires is already known wherein the starting materials consist of alloys on a copper or aluminum base with superconductive intermetallic compounds, such a niobium and tin, incorporated therein by fusion (see German Patent 2,116,260).
- superconductive intermetallic compounds such as a niobium and tin, incorporated therein by fusion
- elongated deposits, for example, of the intermetallic compound Nb 3 Sn are obtained by directional solidification.
- the alloy which is produced in this way can be processed by wire drawing porcesses, inter alia, to form superconductive wires.
- it is essential that the spaces between the extended precipitates are minimized to such an extent by the deformation process that they can be superconductively bridged by the tunnel effect.
- the known processes are subject to the disadvantage of only being suitable for producing cast elements of relatively small dimensions which are, in fact, too small for many applications.
- these known processes are practically limited to the production of thin wires or wire-like structures as the superconductive alloys can only be produced by rolling and wiredrawing processes in which the incorporated particles of superconductive compounds are arranged parallel to each other and drawn sufficiently closely together (parallel flow lines) for the mutual spacing to be bridged by the tunnel effect.
- An object of this invention is to eliminate the above disadvantages of the known processes and to disclose a method of producing superconductive alloys which can be further worked in an economic manner to form molded elements of desired shape and dimensions.
- This process involves a process for incorporating a superconductive compound or compounds by fusion in a base metal having good electrical and heat conductive properties, such as copper, silver, aluminum, and gold.
- the process includes preparing a melt of the base metal and of the alloy components which combine to form the superconductive compound or compounds having a ⁇ - W (A 15 ) structure.
- the melt is solidified at a cooling rate of at least 1000° C./sec.
- a ductile superconductive alloy is formed, wherein the individual particles of the superconductive compounds are finely distributed in the base metal and are mutallly spaced with respect to each other in such a way that the critical value for the tunnel effect is not exceeded.
- niobium or vanadium and tin aluminum, silicon, gallium, or germanium.
- the melt is caused to solidify at a cooling speed of 5 ⁇ 10.sup. 4 to 1 ⁇ 10 6 ° C./sec.
- the rapid solidification of the melt can be carried out (i) by a method known as granulation, (ii) spraying of droplets of the melt, (iii) by centrifugal action onto cooling surfaces, (iv) by spraying, or (v) by melt spinning, and then the solidified alloy particles are worked to form molded bodies.
- the rapid solidification of the melt is achieved by forcing the melt out of cooled nozzles or by the roll casting process.
- This invention also includes the alloys produced according to the process of this invention.
- This invention thus departs from the premise that to produce a superconductive compound having the desired properties, the structural composition thereof must be improved in such a way that an extended form and parallel arrangement of the incorporated superconductive compounds is no longer necessary.
- This invention also proceeds from the observation that extremely rapid solidification of the alloy melts or cooling rates above the given limit value enable a sufficiently fine distribution of the superconductive compounds to be obtained in the base metal. As a result of the high cooling speed, instead of a few large precipitates, a plurality of small precipitates spaced substantially closer together are produced.
- the solidification rate of the alloy melt (for instance, in the Cu-Nb-Sn system on the quasibinary section Cu-Nb 3 Sn) is raised to a specific value (in the case of this system it is estimated at about 5,000° C./sec.) the spacing between the minute, finely distributed, superconductive precipitates in the copper matrix falls below the critical value for the tunnel effect.
- the alloy produced in this way is super-conductive and electrically and mechanically isotropic without having to subject it to further treatment to draw the precipitated particles closer together.
- the superconductive alloys produced according to this invention are extremely ductile; they can be worked at high levels of deformability without impairing their electrical and mechanical properties, for example, by means of extrusion processes to form hollow sections. With the alloy produced according to this invention, it is also very simple to obtain superconductive connections, for example, by friction welding or by electron beam welding.
- Example 2 The preferred embodiment of this invention is represented by Example 2.
- the solidified samples were approximately 10 cm in length and about 5 mm in diameter. In this state, they possessed a transition temperature of about 7° K and after processing to form wires having a diameter of 0.5 mm this rose to 14° K. This represents the prior art.
- the same alloy was then finely divided into small droplets by means of a rotating centrifugal siphon from graphite in an argon atmosphere.
- the particles solidified at a solidification rate of about 10 4 ° C./sec. to form a granulate having an average grain diameter of about 0.5 mm.
- the apparatus had a throughput capacity of 1.2 to /hr.
- the granulate was then subjected to a reduction annealing process, compacted to form extrusion press plugs having a diameter of 15 cm and subsequently extruded to form tubes having an outer diameter of 20 mm and a wall thickness of 2mm.
- This alloy was then finely divided into droplets using a rotating centrifugal siphon from graphite in an argon temperature.
- the particles came to rest at a sharp angle on cooled metal sheets and there solidified to form elongated flake-shaped particles having a thickness of about 50 ⁇ m with a solidification rate of about 10 6 ° C./sec.
- These particles where then compacted to form extrusion press plugs having a diameter of 6 cm and subsequently extruded to form rods having a diameter of 10 mm.
- the rods were then worked by means of circular hammers and wire drawing to form wires having a diameter of 1 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2347507A DE2347507C3 (de) | 1973-09-21 | 1973-09-21 | Verfahren zur Herstellung duktiler supraleitender Formkörper |
| DT2347507 | 1973-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US4000014A true US4000014A (en) | 1976-12-28 |
Family
ID=5893228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US05/507,072 Expired - Lifetime US4000014A (en) | 1973-09-21 | 1974-09-18 | Process for producing ductile superconductive alloys |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4000014A (nl) |
| JP (1) | JPS5074996A (nl) |
| CA (1) | CA1038172A (nl) |
| DE (1) | DE2347507C3 (nl) |
| FR (1) | FR2244826B3 (nl) |
| GB (1) | GB1473334A (nl) |
| NL (1) | NL7410980A (nl) |
| SE (1) | SE389686B (nl) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088512A (en) * | 1977-01-21 | 1978-05-09 | The United States Of America As Represented By The United States Department Of Energy | Quench-age method for the fabrication of niobium-aluminum superconductors |
| US4244722A (en) * | 1977-12-09 | 1981-01-13 | Noboru Tsuya | Method for manufacturing thin and flexible ribbon of dielectric material having high dielectric constant |
| US4257830A (en) * | 1977-12-30 | 1981-03-24 | Noboru Tsuya | Method of manufacturing a thin ribbon of magnetic material |
| US4265682A (en) * | 1978-09-19 | 1981-05-05 | Norboru Tsuya | High silicon steel thin strips and a method for producing the same |
| US4339508A (en) * | 1977-11-28 | 1982-07-13 | Shiro Maeda | Method for manufacturing a thin and flexible ribbon of superconductor material |
| US4363769A (en) * | 1977-11-23 | 1982-12-14 | Noboru Tsuya | Method for manufacturing thin and flexible ribbon wafer of _semiconductor material and ribbon wafer |
| US4378330A (en) * | 1979-03-12 | 1983-03-29 | The United States Of America As Represented By The Department Of Energy | Ductile alloy and process for preparing composite superconducting wire |
| US4414738A (en) * | 1981-02-02 | 1983-11-15 | The United States Of America As Represented By The Secretary Of The Navy | Optical lithographic technique for fabricating submicron-sized Josephson microbridges |
| US4525223A (en) * | 1978-09-19 | 1985-06-25 | Noboru Tsuya | Method of manufacturing a thin ribbon wafer of semiconductor material |
| US5041416A (en) * | 1988-10-17 | 1991-08-20 | Fmc Corporation | Superconductive metal matrix composites and method for making same |
| US5189009A (en) * | 1987-03-27 | 1993-02-23 | Massachusetts Institute Of Technology | Preparation of superconducting oxides and oxide-metal composites |
| US5204318A (en) * | 1987-03-27 | 1993-04-20 | Massachusetts Institute Of Technology | Preparation of superconducting oxides and oxide-metal composites |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3196532A (en) * | 1965-02-05 | 1965-07-27 | Gen Electric | Method of forming a superconductive body |
| US3472705A (en) * | 1967-04-07 | 1969-10-14 | Air Reduction | Fabrication of niobium superconductor alloys |
| US3713898A (en) * | 1971-04-26 | 1973-01-30 | Atomic Energy Commission | PROCESS FOR PREPARING HIGH-TRANSITION-TEMPERATURE SUPERCONDUCTORS IN THE Nb-Al-Ge SYSTEM |
| US3748728A (en) * | 1970-04-13 | 1973-07-31 | Corning Glass Works | Method of making granular superconductors |
-
1973
- 1973-09-21 DE DE2347507A patent/DE2347507C3/de not_active Expired
-
1974
- 1974-08-12 JP JP49092235A patent/JPS5074996A/ja active Pending
- 1974-08-16 NL NL7410980A patent/NL7410980A/nl not_active Application Discontinuation
- 1974-08-30 SE SE7410980A patent/SE389686B/xx unknown
- 1974-09-18 US US05/507,072 patent/US4000014A/en not_active Expired - Lifetime
- 1974-09-18 GB GB4071074A patent/GB1473334A/en not_active Expired
- 1974-09-18 FR FR7431570A patent/FR2244826B3/fr not_active Expired
- 1974-09-20 CA CA209,658A patent/CA1038172A/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3196532A (en) * | 1965-02-05 | 1965-07-27 | Gen Electric | Method of forming a superconductive body |
| US3472705A (en) * | 1967-04-07 | 1969-10-14 | Air Reduction | Fabrication of niobium superconductor alloys |
| US3748728A (en) * | 1970-04-13 | 1973-07-31 | Corning Glass Works | Method of making granular superconductors |
| US3713898A (en) * | 1971-04-26 | 1973-01-30 | Atomic Energy Commission | PROCESS FOR PREPARING HIGH-TRANSITION-TEMPERATURE SUPERCONDUCTORS IN THE Nb-Al-Ge SYSTEM |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088512A (en) * | 1977-01-21 | 1978-05-09 | The United States Of America As Represented By The United States Department Of Energy | Quench-age method for the fabrication of niobium-aluminum superconductors |
| US4363769A (en) * | 1977-11-23 | 1982-12-14 | Noboru Tsuya | Method for manufacturing thin and flexible ribbon wafer of _semiconductor material and ribbon wafer |
| US4339508A (en) * | 1977-11-28 | 1982-07-13 | Shiro Maeda | Method for manufacturing a thin and flexible ribbon of superconductor material |
| US4244722A (en) * | 1977-12-09 | 1981-01-13 | Noboru Tsuya | Method for manufacturing thin and flexible ribbon of dielectric material having high dielectric constant |
| US4257830A (en) * | 1977-12-30 | 1981-03-24 | Noboru Tsuya | Method of manufacturing a thin ribbon of magnetic material |
| US4525223A (en) * | 1978-09-19 | 1985-06-25 | Noboru Tsuya | Method of manufacturing a thin ribbon wafer of semiconductor material |
| US4265682A (en) * | 1978-09-19 | 1981-05-05 | Norboru Tsuya | High silicon steel thin strips and a method for producing the same |
| US4378330A (en) * | 1979-03-12 | 1983-03-29 | The United States Of America As Represented By The Department Of Energy | Ductile alloy and process for preparing composite superconducting wire |
| US4414738A (en) * | 1981-02-02 | 1983-11-15 | The United States Of America As Represented By The Secretary Of The Navy | Optical lithographic technique for fabricating submicron-sized Josephson microbridges |
| US5189009A (en) * | 1987-03-27 | 1993-02-23 | Massachusetts Institute Of Technology | Preparation of superconducting oxides and oxide-metal composites |
| US5204318A (en) * | 1987-03-27 | 1993-04-20 | Massachusetts Institute Of Technology | Preparation of superconducting oxides and oxide-metal composites |
| US5439880A (en) * | 1987-03-27 | 1995-08-08 | Massachusetts Institute Of Technology | Preparation of superconducting oxides by oxidizing a metallic alloy |
| US5545613A (en) * | 1987-03-27 | 1996-08-13 | Massachusetts Institute Of Technology | Preparation of superconducting oxides and oxide-metal composites |
| US5643856A (en) * | 1987-03-27 | 1997-07-01 | Massachusetts Institute Of Technology | Preparartion of superconducting oxides and oxide-metal composites |
| US5883052A (en) * | 1987-03-27 | 1999-03-16 | Massachusetts Institute Of Technology | Preparation of superconducting oxides and oxide-metal composites |
| US5041416A (en) * | 1988-10-17 | 1991-08-20 | Fmc Corporation | Superconductive metal matrix composites and method for making same |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1038172A (en) | 1978-09-12 |
| FR2244826B3 (nl) | 1977-07-01 |
| GB1473334A (en) | 1977-05-11 |
| NL7410980A (nl) | 1975-03-25 |
| JPS5074996A (nl) | 1975-06-19 |
| SE7410980L (nl) | 1975-03-24 |
| DE2347507B2 (de) | 1978-11-09 |
| DE2347507C3 (de) | 1981-07-02 |
| DE2347507A1 (de) | 1975-04-03 |
| SE389686B (sv) | 1976-11-15 |
| FR2244826A1 (nl) | 1975-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4000014A (en) | Process for producing ductile superconductive alloys | |
| Verhoeven et al. | Strength and conductivity of in situ Cu-Fe alloys | |
| US4495691A (en) | Process for the production of fine amorphous metallic wires | |
| CA1055734A (en) | Aluminum nickel alloy electrical conductor | |
| US5336342A (en) | Copper-iron-zirconium alloy having improved properties and a method of manufacture thereof | |
| US3462248A (en) | Metallurgy | |
| US5102620A (en) | Copper alloys with dispersed metal nitrides and method of manufacture | |
| US4127426A (en) | Method of making electrical conductors of aluminum-iron alloys | |
| US3625677A (en) | Aluminum alloys | |
| CN113737060A (zh) | 一种AlSiLi相时效强化型低密度铝合金及其制备方法 | |
| JP2705996B2 (ja) | 高力マグネシウム基合金 | |
| US4082573A (en) | High tensile strength aluminum alloy conductor and method of manufacture | |
| US4961457A (en) | Method to reduce porosity in a spray cast deposit | |
| US4818283A (en) | Dispersion hardened copper alloys and production process therefore | |
| CN109332706A (zh) | 一种高导电性高强度耐热铝合金导线的制备方法 | |
| US5071474A (en) | Method for forging rapidly solidified magnesium base metal alloy billet | |
| US4066475A (en) | Method of producing a continuously processed copper rod | |
| US4395464A (en) | Copper base alloys made using rapidly solidified powders and method | |
| US4402745A (en) | New iron-aluminum-copper alloys which contain boron and have been processed by rapid solidification process and method | |
| US5192377A (en) | Process of producing continuously cast monotectic aluminum-silicon alloy strip and wire | |
| JPS60234936A (ja) | 高温強度に優れたアルミニウム合金成形材 | |
| JPS6247449A (ja) | 耐熱アルミニウム粉末冶金合金 | |
| US4000008A (en) | Method of treating cast aluminum metal to lower the recrystallization temperature | |
| JPS6173849A (ja) | Ｃｕ基超伝導合金 | |
| JP3087964B1 (ja) | 自由落下液滴の衝突凝固による高品質結晶材料の製造方法 |